Heya,
not very keen on the fleet wide bonus through the archmagos. Keep the current system with the pool as you had with slightly changed gifts (the FDT for example).
But hey, that's my opinion.
Any particular reasons why? To be clear, I still agree that the current system
works, but I don't really like the way it functions; it's too clunky. Basically, it comes down to:
-It adds a lot of steps before games (pick for archmagos, check Ld/pick for Ld6 ships, roll on table for others, assign upgrades).
-The random aspect causes a lot of variability in fleet power, but doesn't have a strong fluff backing for doing so.
-Currently, EER and GTM are basically "bad" picks that effectively penalize you compared to other options. And as you said, Adv Engines are only useful in a meta-build if you get a bunch of them.
The proposed system fixes these issues:
-Less steps because you just pick once for each ship, and then pick one extra for your Archmagos. This can even be done during list-building because it is no longer random.
-Fleet power is more consistent (due to choice), and to offset the increased potential for stacking, the "top" upgrades get toned down (FDT and AWR).
-Bad picks (aka "illusions of choice") are eliminated, as you now only choose between the top 3, while the weaker options are given over to the Archmagos to offset part of his cost.
Now, if the fleet-wide aspect is the cause for balance concerns here (which was the first thing that came to mind when I was thinking up this plan, based on everyone's comments), perhaps it would be better if the EER (new version) and Engine upgrades (either separately or together) were only applied to the Archmagos' ship?
So something like:
-Each capital ship chooses between AWR (new), FDT (new), or AS.
-Archmagos' ship also gets either EER (new), +5cm spd, or -5cm turn distance.